Error returns an error representing c and msg.

Errorf returns Error(c, fmt.Sprintf(format, a...)).

ErrorProto returns an error representing s.

FromError returns a Status representing err if it was produced from this package, otherwise it returns nil, false.

FromProto returns a Status representing s.

New returns a Status representing c and msg.

Newf returns New(c, fmt.Sprintf(format, a...)).

Status represents an RPC status code, message, and details.